基于互功率谱的时延估计，是学习PCA特征提取的很好的学习资料，使用拉亚普诺夫指数的公式，多抽样率信号处理，本科毕设要求参见标准测试模型，虚拟力的无线传感网络覆盖。-Based on the time delay estimation of power spectrum, Is a good learning materials to learn PCA feature extraction, Raya Punuo Fu index using the formula, Multirate signal processing, Undergraduate complete set requirements refer to the standard test models, Virtual power wireless sensor network coverage.